Clock thermostat



FIG. 1 is a left front perspective view of a clock thermostat showing mynew design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the rear, not shown, beingsubstantially flat, plain, and unornamented;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a bottom plan view thereof.

The ornamental design for a clock thermostat, substantially as shown anddescribed.